228921790 has 8 divisors (see below), whose sum is σ = 412059240. Its totient is φ = 91568712.

The previous prime is 228921769. The next prime is 228921817. The reversal of 228921790 is 97129822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11446080 + ... + 11446099.

It is an arithmetic number, because the mean of its divisors is an integer number (51507405).

Almost surely, 2^228921790 is an apocalyptic number.

228921790 is a deficient number, since it is larger than the sum of its proper divisors (183137450).

228921790 is a wasteful number, since it uses less digits than its factorization.

228921790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22892186.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 228921790 is about 15130.1615986083. The cubic root of 228921790 is about 611.7336599336.

The spelling of 228921790 in words is "two hundred twenty-eight million, nine hundred twenty-one thousand, seven hundred ninety".